I was also testing with that same test dataset when you wrote this last
message. In my testing using MS4W v3.2.5 here (MapServer 7.0.7, GDAL
2.2.3) I can display both the v1.2 and v1.0/1.1 test datasets of GPKG.
(I remember painfully spending a lot of time building spatialite with
sqlite, for the MS4W community).